SGL is the #1 International Gemmological Laboratory

in the United Kingdom to specialise in certifying diamonds and diamond studded jewellery and to offer Mobile laboratory services all over the country. SGL certifies each diamond with thorough detail supported by the latest technology and vast gemmological expertise of a highly qualified team.

Postal Instructions for United Kingdom, Ireland and Scotland

When posting items for grading to SGL please either call or email the laboratory to advise what has been sent and when we can expect it. Once items have been received SGL will call you and send you an email to confirm receipt.

Please address packages to Solitaire Gem Labs. It is advised that words pertaining to the contents of the package such as ‘jewellery’ or ‘diamonds’ be omitted from the outside of the parcel.. If company details are required, i.e., Company name mentioned as a return address, please take precaution by using an acronym, trade name or building number.

Items should always be sent via Special Delivery. SGL accepts no responsibility for damage or loss in the post, either when receiving or returning items.

Product Shipment within UK only

What Customers Say

SGL helped me understand the contents of a diamond certificate with the basic 4Cs of a diamond which increased my product awareness. I am confident now and definitely know more about a diamond and it’s certification then I knew before.

Margaret Roberts

Buying an SGL certified diamond inspired confidence in me and helped me verify that I am buying a product that gives me a bang for the buck.

John Bullet

The SGL Diamond Jewellery Report explains the characteristics of jewellery and the stones contained in it in an eye pleasing format. It complements the jewellery I have bought it with.

About SGL

Solitaire Gem Labs (SGL) is an independent international laboratory that provides professional gemstone identification and grading services to the gems & jewellery industry worldwide through its centers in London, Dubai, Jeddah, Riyadh, Mumbai (Bombay), Bangalore, Chennai, Hyderabad, Thrissur, Coimbatore, Pune, Jaipur and Kolkata. We are also the first international gemmological laboratory to specialize in certifying diamond studded jewellery in the United Kingdom and to offer Mobile laboratory services all over the country for the same.